Handling a WindowMessage and returning a value in C#

[Samus Aran]

Hi, Rainmeter Community
I got asked to make my app return a value if WindowMessaged by Rainmeter.
While I'd gladly implement that, I have no idea how. Do I have to override the WndProc()-method, and if so, how would I pass a value to Rainmeter only?
Thanks for any help in advance.

[poiru]

A better (and easier) approach would be to write to the registry from your app (and using Measure=Registry in Rainmeter to read the values).

[Samus Aran]

Thanks, that worked.